Journal of the Korean Institute of Telematics and Electronics B (전자공학회논문지B)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Study on TCVQ Using Orthogonal Spline Wavelet

직교 스플라인 웨이브렛 변환을 이용한 TCVQ 설계에 관한 연구

  • 류중일 (연세대학교 전자공학과) ;
  • 김인겸 (연세대학교 전자공학과) ;
  • 김성만 (연세대학교 전자공학과) ;
  • 정현민 (연세대학교 전자공학과) ;
  • 박규태 (연세대학교 전자공학과)
  • Published : 1995.11.01
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Abstract

In this paper, the method to incorporate TCVQ(Trellis Copded Vector Quantizer) into the encoding of the wavelet trans formed(WT) image followed by a variable length coding(VLC) or an entropy coding(EC) is considered. By WT, an original image is separated into 10 bands with various resolutions and directional components. TCVQ used to compress these WT coefficients is a finite state machine that encodes the input source on the basis of the current input and the current state. Wavelet basis used in this paper is designed by orthogonal spline function. A modified set partitioning algorithm to Wang's is also presented. A simple modification to Wang's algorithm gives a highly time-efficient result. Proposed WT-TCVQ encoder shows a very competitive result, giving 37.46dB in PSNR at 1.002bpp when encoding 512$\times$512 LENA.

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